The 20-year-old followed in his brother Jude’s footsteps in the summer transfer window, joining Dortmund from newly promoted Sunderland.
He has since struggled to break into the first team under Niko Kovac, starting just two of his five Bundesliga games so far.
According to BILD, his father continues to be unimpressed with his son’s treatment, having already stormed the Dortmund dressing room to demand answers.
As a result of Bellingham Sr’s actions, family members have now been banned from entering the club’s dressing room.